This limitation in DWI metadata is broadly overcome by the Brain Imaging Data Structure (BIDS)[1]}, an extensible storage standard for neuroimaging data. BIDS presents data in a consistent format (.nii and .nii.gz files), permitting substantial code reuse. Image data from an acquisition is supplemented by metadata in .json files, drawn directly from parent DICOM files during conversion [2]}. BIDS specifies a coherent file naming scheme, as well as a directory structure that divides acquisitions on the basis of subject, session, and imaging modality. A large range of neuroimaging data are now fully or partially supported by BIDS, incorporating structural and functional MRI [1]}, positron emission tomography [4]}, and electro/magnetoencephalography [5]}, [6]}, as well as several calibration standards. The logical structure of BIDS simplifies traversing datasets, allowing similar tools and libraries to access dissimilar data. BIDS gives several methods to extend its functionality, from adding new keys to metadata, to the addition of entire supplementary files.
